Anti-Korean sentiment in Japan refers to opposition, hostility, hatred, distrust, fear, and general dislike of Korean people or culture in Japan. Relations between Japan and Korea can date back to nearly two millennia, mostly defined through cultural exchanges and diplomatic trade. However, major events involving military aggression and political disputes play a key factor in harboring negative sentiment. Much of the current anti-Korean sentiment stems from conservative politicians and far-right groups.

Anti-Chinese sentiment has been present in Japan since ancient times. While Japan was historically influenced by China with its writing system, architecture, and religion, negative sentiment of China has persisted to modern times, due to nationalistic and historical disputes.